LS Engine Idling Issue - Lateral-g Forums

ItDoRun · #1 10-20-2015, 07:50 PM

Finally got my car started (after 8 years of building) but it won't idle at all. I have to feather the pedal to keep it running. Also noticed my volt meter on my New Vintage gauges is only showing 8 volts when running. Fan 1 comes on in the key on position. Let's start with the idling issue first though. I do know hat PSI programmed my ECM for the wrong style MAF. Would that be causing the issue? I talked to Gary at PSI this morning and he said the car would still run like it is.

2008 6.0L short block
LS3 heads
LS3 Intake
Custom cam/springs
Stock valve train

Ok, where do I start with the idling issue?

Vega$69 · #2 10-20-2015, 08:30 PM

Check the port on the drivers side of the intake just behind TB. Should be plugged

ItDoRun · #3 10-21-2015, 04:14 AM

Quote:

Originally Posted by Vega$69

Check the port on the drivers side of the intake just behind TB. Should be plugged

It's capped.

ItDoRun · #4 10-21-2015, 04:15 AM

How does the voltage play into this? Or does it make that big of a difference?

Vega$69 · #5 10-21-2015, 06:18 AM

I would 1st look for vacuum leaks and open ports on the intake. Ports on the rear for the booster etc. also check that TB and O ring are snug.

Is the MAF sensor installed?

What have you done regarding tuning for you set up?

ItDoRun · #6 10-21-2015, 09:39 AM

Quote:

Originally Posted by Vega$69

I would 1st look for vacuum leaks and open ports on the intake. Ports on the rear for the booster etc. also check that TB and O ring are snug.

Is the MAF sensor installed?

What have you done regarding tuning for you set up?

I checked all the vacuum/PCV hoses and they're all tight. I'll check the TBthis evening. Yes, MAF is installed. PSI did a start up tune when I purchased the ECM.